Robust Detection of Moving Human Target Behind Wall via  Impulse through-Wall Radar

Jun Hu; Zhenlong Yuan; Guofu Zhu; Zhimin Zhou

doi:10.14429/dsj.63.5766

Jun Hu National University of Defense Technology, Changsha
Zhenlong Yuan National University of Defense Technology, Changsha
Guofu Zhu National University of Defense Technology, Changsha
Zhimin Zhou National University of Defense Technology, Changsha

DOI: https://doi.org/10.14429/dsj.63.5766

Keywords: Ultra-wide band, through-wall radar, clutter mitigation, target detection, constant false alarm rate

Abstract

Through-wall human target detection is highly desired in military applications. We have developed an impulse through-wall radar (TWR) to address this problem. In order to obtain a robust detection performance, firstly we adopt the exponential average background subtraction (EABS) method to mitigate clutters and improve the signal-to-clutter ratio (SCR). Then, different from the conventional constant false alarm rate (CFAR) methods that are applied along the fast-time dimension, we propose a new CFAR method along the slow-time dimension to resist the residual clutters in the clutter mitigation output because of timing jitters, based on the presence of a larger relative variation of human target moving in and out in comparison with that of residual clutters in the slow-time dimension. The proposed method effectively solves the false alarm issue caused by residual clutters in the conventional CFAR methods, and obtains robust detection performance. Finally, different through-wall experiments are provided to verify the proposed method.

Defence Science Journal, 2013, 63(6), pp.636-642, DOI:http://dx.doi.org/10.14429/dsj.63.5766

Author Biographies

Jun Hu, National University of Defense Technology, Changsha

Mr Jun Hu received the BS from the Hunan University, Changsha, China, in 2008, and the MS from the National University of Defense Technology, Changsha, China, in 2010. He is currently pursuing his phD from National University of Defense Technology. His main research interests include ultra-wideband radar, automatic target detection, and signal processing.

Zhenlong Yuan, National University of Defense Technology, Changsha

Mr Zhenlong Yuan received his BS from the Xidian University, Xi’an, China, in 2010, and MS from the National University of Defense Technology, Changsha, China, in 2012. His areas of interest are radar signal processing, and target detection and recognition.

Guofu Zhu, National University of Defense Technology, Changsha

Dr Guofu Zhu received his BS, MS and phD from the National University of Defense Technology, Changsha, China, in 1994, 1997, and 2001, respectively. He is currently an associated professor of the National University of Defense Technology. His research interests mainly include ultra-wideband system, radar imaging and target detection.

Zhimin Zhou, National University of Defense Technology, Changsha

Dr Zhimin Zhou received the BS, MS, and phD from the National University of Defense Technology, Changsha, China, in 1982, 1989, and 2002, respectively. He is currently a professor of the National University of Defense Technology. He is a senior member of the Chinese Institute of Electronics. His fields of interest include ultra-wideband radar system and real-time signal processing.